IEC 60080: Test Methods for Electrochemical Power Sources

The “Meta-Standard” for Battery Testing: How IEC 60080 Shaped Every Modern Battery Standard

IEC 60080 is the early electrochemical power source testing foundation standard. It established the C-rate concept, CC-CV charging methodology, and end-voltage definition — three concepts that remain the cornerstone of every battery test standard today.

C-rate definition: 1C = the current that discharges the full nominal capacity in 1 hour. IEC 60080 first standardized this. For a 100 Ah battery: 1C = 100 A, 0.5C = 50 A, 2C = 200 A. This elegant definition allows direct rate-performance comparison across different battery capacities.

Modern inheritance: IEC 61960 (secondary lithium) and IEC 62620 (industrial lithium) test methods — including capacity determination, cycle life, and internal resistance measurement — all trace their methodology back to the framework established by IEC 60080.

TN Lab — Every test parameter a battery engineer uses daily traces back to this foundational standard.